package com.tedu.basic.Test;
//本类用于测试 数据交换

import java.util.Scanner;

public class Test4_NumberExchange {
    public static void main(String[] args) {
        Scanner s=new Scanner(System.in);
        int a=s.nextInt();
        int b=s.nextInt();

        System.out.print(a);
        System.out.println(b);
        int c=a;
        a=b;b=c;
        System.out.print(a);
        System.out.print(b);


    }

}
